That's actually something the developers should consider putting in - a skirmish mode with just you on the map, but you can trigger an invasion if you want. Good for people who just want to get a feel for the tech tree without worrying about winning.

That's actually something the developers should consider putting in - a skirmish mode with just you on the map, but you can trigger an invasion if you want. Good for people who just want to get a feel for the tech tree without worrying about winning.

Actually, that's the way current defending skirmishes work when your playing only an NPC.